A lawsuit against GM has been certified as a class action for General Motors customers in seven U.S. states. The lawsuit affects customers who own Chevy Silverado and GMC Sierra pickup trucks equipped with the 6.6L V8 LML turbodiesel Duramax engine. According to the lawsuit, the Bosch CP4 fuel pump on these engines is defective.
Per a report from Car Complaints, the lawsuit alleges that 2011- through 2016-model-year Chevy Silverado and GMC Sierra pickups equipped with the 6.6L V8 LML turbodiesel Duramax engine are equipped with defective Bosch CP4 fuel pumps that are more fragile and prone to wear than previous CP3 fuel pumps. According to plaintiffs, the defective CP4 pumps can be destroyed by U.S. diesel fuel, which is allegedly “drier” than diesel fuel in other countries.
The lawsuit alleges that U.S. diesel fuel does not provide adequate lubrication for the CP4 fuel pump. The lack of lubrication can lead to internal fuel pump damage and result in metal shavings that damage the pump, the fuel system, and the GM Duramax engine as well. This damage can lead to the truck stalling and losing power, and may require the vehicle to be towed to a shop, leaving customers with big repair bills.
The lawsuit goes on to allege that GM was aware that the Duramax engines and related fuel pumps were defective prior to selling affected vehicles, but declined to notify customers. Rather, GM allegedly concealed that the defective CP4 pumps may be destroyed by U.S. diesel fuel.
Now, the new lawsuit has been certified as a class action for customers in California, Florida, Illinois, Iowa, New York, Pennsylvania, and Texas. The lawsuit was filed in the U.S. District Court for the Eastern District of Michigan (Southern Division), while plaintiffs are represented by The Miller Law Firm, P.C., Hagens Berman Sobol Shapiro LLP, and Hilliard Martinez Gonzalez LLP.
As GM Authority covered previously, GM’s motion to dismiss the lawsuit in California was rejected.
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Comments
I consistently add Lucas to my fuel system when I fuel up to prevent this from occurring. Shouldn’t have to, but the “low sulfer” diesel made for US emissions isn’t healthy for a CP4.
Me to Mike seems to be working
This happened to me. Stuck on the side of the freeway for over 6 hours. Scary and dark! Repairs were estimated at $10,000-$15,000
Shame on GM ! Wrong headed and wrong direction for this. ALl my family owns is Chevrolet trucks and two classic cars. Two of the trucks are diesels one is an LML. The AFM engie in our 2009 is garbage and the top end was replaced at my cost at 80k. Worst design ever until the CP4. Look at your heads of departments GM, the decisions they are making are not in your best interest. Replace the Cp4’s like Dodge or you will see loyal Americans switching to them.
GM did abandon the CP4 pump in favor a much better Denso unit. GM, Ford and Ram were all using the CP4 pump at one time.
GM was the first to abandon the CP4, followed by Ram who went back to the CP3 and Ford still uses this defective pump to this day.
Lawsuit should be against Bosch
You on glue? Regulation was implemented before the Biden administration. If you want to run dirty fuel then the emissions on the engines today would be 3 times the size/problems. The pump is just not suitable for what the manufacturers were demanding out of it.
CP3 to CP4, “fix what’s not broke”. I’ll bet the CP4 was cheaper to manufacture. Happens all the time. Another case, the GM ignition switch redesign that killed many in collisions because it switched off the air bags. What was wrong with the previous switch? Nothing!
So, I’m very sorry for the past and present expensive repairs incurred with any individuals. For the rest of us, some with lower mileage on our vehicles 6.6 are just waiting and praying that no damage or breakdowns occur in the middle of a family trip, leaving us helpless, and unable to afford the time and high expenses of a off road repair. This is what a genuine recall is all about.it is not the customers fault, but the companies. So for now, we ride in ticking time bombs. WTF….
All you have to do for a mostly reliable lml is install a lift pump either airdog or fass ( airdog is my preference ) and also install a exergy fuel system saver. The lift pump will in most cases save the cp4 from being destroyed by keeping the fuel system pressurized so no air can get to the cp4 and it also removes water from the system and the exergy fuel system saver will in most cases catch the metal shavings if the cp4 still decides to grenade which at that point you can do a cp3 conversion and only have swap the pump instead of the whole fuel system.
One of the reasons I went with the duramax was for life longevity of the engine paired with the allison transmission.
I have just over 100k miles on my Silverado and I’m at the milestone where sh#t seems to happen with the CP4 for a lot of trucks. Now I’m afraid to take the truck on long trips, and in the back of my mind I’m always wondering when the CP4 will grenade. From what I’ve read the repair cost can approach $15k. GM and/or Bosch should be held accountable.
100,000 miles, change the fuel pump now.
Yep, mine failed at 116K mileage. I would hurry up and convert it. I traded in my truck at the time of the failure in a “not running” condition. I was about 2 months away from trading it in anyway because of a major change in my living / working situation. Just really unlucky timing. Nevertheless, my trade in value went from about 20k to 9k in the blink of an eye. This law suit is my only hope for any reimbursement. Take my advice, upgrade the system and keep your receipts in case they recall. Otherwise, expect a major cost to repair WHEN it fails. Best of luck to all of you guys.
Mine just went at 123k 🙁 I’m in AZ but my truck is from TX. Hoping they do a recall or something. The $5k fix is hard to swallow.
If it only costs you $5K, you’re getting a bargain. But that only applies if they’re not replacing it with another CP4.
Steve-o 125k km… I neglected to think this could happen to me. Frequent fuel filter changes.. unfortunately just last week driving home the cp4 left me on the side of the road. Change yours while you can
It isn’t your fault, it is the pump and no matter how many times you changed your fuel filter probably wouldn’t have helped. It is lack of lubrication for a crappy designed fuel injection pump. Any water getting into your system, along with lack of lubrication, brings on the death of the pump. Convert to a CP3 (near bullet proof) and add a lift pump with its own fuel filter and water seperator and you’ll be better off. Don’t replace with another CP4 or CP4.2.
I am keeping my fingers crossed that the CP4 in my 2012 Silverado will not implode before I can address the issue with a fix or a new truck – neither are in my current budget with the cost of living emptying my wallet, and diesel averaging $4.60-4.80/gallon in my neck of the woods this week.
2013 Silverado 3500 with 226k mine just left me stranded on the side of the road approximately two weeks ago it’s in the shop now. Need to find out how to get on this list for claims
Drew, if you live in a state that is included in the class action lawsuit, you still own the truck, or owned it and had tplo have repair, you are automatically added to the class action suit if that’s what you want. If you don’t want to be in the class action, you have to send in a letter requesting to be exempt. You should have received a notification card in the mail if you are in one of those three categories. If you did not, your state may not allow the class action, leaving you and other owners to go it alone. I exempted myself to wait for the NTHSA to issue a mandatory recall to recover my full repair bill than to take any scraps left over by the lawyers who are going to get rich.
This is the last thing I’ve been waiting on since finding out that the fuel pump failure is not an “if”, but a when kinda situation. We’re scheduled to have a fuel saver by S & S and a lift pump added very shortly. This isn’t the owner’s fault. The manufacturers should eat this. We need to be reimbursed over this costly failure. A RECALL should follow suit. We, like you, don’t want lawyer leftovers. We want what we’ve had to do to keep our rides rolling. It ain’t cheap either.
Ditto, 122,800 miles.
$13,109.00 plus $557.00 rental 10 days.
Pump alone Chevy charged me $4977.34 just for pump kit!
I replaced the CP4 pump with a CP3 on my Chevrolet 2500HD. The CP3 pump kit cost $1897.00 and the mechanic charged $3100 give or take a few dollars to do the removal and installation. A new Air Dog lift pump and water seperator was installed also.
If you have one put a Fass or Air Dog on it just to protect your truck if you love your truck, I miss mine. The factory located fuel filters are junk as well if you go by their filtration numbers, if I went out west I came back with grit in my injector from the sand in the barges they bring diesel in with. You don’t want to inspect the tanks in the barges and trucks they haul your diesel in. I took all precautions and maintained regularly because my business depended on it, Russian Roulette is what I was playing unknowingly east coast diesel is a little easier on them but not much.
Hello all I have a 2019 diesel and my pump just went out. Quotes are $12-20k. I have to replace the whole fuel system with all new injectors. Funny thing is I own a dodge also but they recalled their cp4 pumps.
I’m pretty sure the 2019 does not have a Cp4
GM stopped using the cp4 in 2016. The 2017 and above duramax’s use the new Denso pump. If you have a 19 and your pump went that’s the first I’ve heard of a Denso pump going.
some blame should be given to the oil companies for making bare minimum diesel fuel and to the gov’t for allowing such poor quality fuel to be made. it’s part of the reason we don’t get as many diesel vehicles here. Tough emission laws and garbage fuel. tough combo to beat.
Actually, the US Government didn’t ALLOW the bad diesel fuel, they REQUIRED it. The process of making low sulfur diesel removed the lubricity of the fuel.
When we switched to unleaded gasoline, the lead was a lubricant for the valves. Engines had to be manufactured with harder seats and valve seals.
True but the oil companies could be putting a lubricant back into the diesel fuel but they don’t. So therefore I do I use Hotshot secret everyday diesel treatment it’s been proven by many tests to provide the lubrication that is needed for the cp4 pump.
Then they should add some lubricity additive back into it. But no that would dig into their profits! Corporate greed.
Most of the blame lands on GM. While Ford and Cummins are certainly not immune to the pump failure……they also have a lift pump supplying pressurized fuel to the CP4. Typical GMC in there smart cost saving decide to run the CP4 as a lift pump AND pressure pump. We all know how long the Cummins 24 valve 5.9 injection pumps run for after the lift pump fails. I remember installing aftermarket low pressure systems to tell us if the lift pump fails as the engine will run fine till the injection pump dies. Root cause on alot of them, failed OEM lift pumps.
That’s very correct jimmy.
My C4 just went on mine and had to be towed. No have to replace everything costing thousands.
Does this mean that because the lawsuit was certified in 7 states that people that own these trucks in a state not included can’t join the lawsuit?
My question exactly! Just got our 2015 Silverado back from the shop. Total cost was $13,025.43. We’re in Colorado Springs, Colorado… What about us???
My 2013 GMC Denali is in the shop now. Only 103 thousand miles. my cp4 blew bill up till today is $16,00. should have been a recall. I guess all the lawyers are chasing ambulances…
Yes the 2019 has the CP4.
They need to get this lawsuit kicked in gear in Ohio. My 2013 cp4 is on its way out now. Still runs but in limp mode and low fuel rail pressure. Fluctuating idle and extremely noisy pump. As much as we pay for these trucks the repairs should be minimal.
CP4 has been trash since it came out. It is not made for the U.S. Every truck owner that has this Pump takes extra steps to make sure that pump doesn’t fail on them. We shouldn’t have to.
Damnest thing..I just smoked a tater in the tool shed fore I headed over to grab ICEE at the Kmart and ask brunette if she wanted to try out my new water bed the CP4 went OUT! I’m goin back to the 06
How or who do you contact about this law suit? I have a 2015 LML with CP4 also
Geometrically the CP4 pump is more efficient. Wish Bosch had made it equally as durable. I know that GM validation tests use various imported fuels to run durability/validation tests. Can’t believe that Bosch and GM missed this.
I can only assume that the cost/benefit study of warranty liability justified the CP4 usage.
Bet they didn’t count on a class action suit in that analysis!
Been using stanadyne lubricity additive since day 1.
2012 LML 31k. DEF pump and DEF injector failure at 30k. Steering box seal blown out at same time. $4,500 to fix both.
My fuel pump on my 2016 craped out at 90000 miles leaving me with a 12000 bill for repairs having to replace fuel rail injectors and the fuel pump. also have a 2013 silverado had the same issue decided to buy a used duramax and swaped it out all total roughly around 11000 dollars again will not by another GM diesel engine for any price.
While it was still working, I replaced my LMLs CP4 around 50,000 miles with a emissions compliant CP3, and recently added a single Kennedy lift pump. All to increase reliability and avoid a catastrophic and costly repair. Any part can fail, but when it fails like the CP4 does by destroying most if not all of the rest of the fuel delivery system in the process, that is simply not acceptable.
Anyway to add a fuel filter after the CP4? When the dealerships redo the fuel system, is the CP4 replaced with another brand or type? I just found my answer for the pump.
u only got the pump or conversion kit
we’re did u get ur pump or was it a conversion kit
Perhaps gas is the way to go
2015 GMC 3500hd 34 000 miles well maintained.
Fuel pump ground itself up sending metal particles throughout the whole Fuel system destroying the engine. Metal particles were discovered throughout the whole system by GM service technicians. GM claims no responsibility for this. It cost close to $14,000 to repair. They did not use the same defective model Fuel pump in the repair. I really feel ripped off. I consider myself a loyal GM customer having owned 20+ GM vehicles. But I guess GM thinks ah screw him,
My 2013 GMC Duramax LML, At 85,000 miles the CP4 fuel injector pump completely imploded, while pulling my travel trailer from California to Phoenix and left me stranded in Kingman AZ. On Valentine’s Day, needless to say my wife was not too pleased. Had to get a tow truck for truck and trailer. Rent a U-Haul truck to pull the trailer rest of the way to Phoenix. One month later and thousands of dollars and a ton of inconveniences. ( The good people of B & B auto and diesel repair Kingman, AZ ) did a excellent job of cleaning up General Motors mess… Not too happy with General Motors right now… and I am cleaning up what I really think…
Waiting for some compensation, always had GM. IF NOTHING IS RESOLVED, I WILL BE SWITCHING BRANDS….
What is needed to get the remaining 43 states included in this Class Action suit? Honestly, I only care about where I live but realistically, we are all impacted by this issue.
My 2016 GMC 3500 Sierra Denali quit running at 72,000 miles while RVing in Grand Junction CO. GMC dealer quoted $16,000 to repair metal in the fuel lines and turbocharger. I’m back home in Phoenix…vacation ruined, towing fees, etc. Will cost close to $20,000 when done. I’ve reached out to the law firms leading the class action to see what can be done. Bought the truck in CA new.
So,? More info, am i supposed tp wait until it blows up? What can i do about it before, 2014 with 40,000moles thanx
I’ve done quite a lot of research on the internet about this issue and it is well documented that the BoschCP4 fuel pump fails and throws metal into the fuel lines. What I’ve learned is that the diesel fuel in the USA does not contain enough lubricants to operate the Bosch fuel pump properly and hence the failure. Most truck manufacturers have discontinued using the Bosch CP4 pump. Some of the articles contain suggestions for actions one can take to minimize the probability of failure such as adding additives to the fuel tank. So, my suggestion to you is to do a search for Bosch CP4 and read away. I’ll bet you will be surprised at the number of posts about the issue.
In a nutshell, most of the articles and you tubers suggest (i) upgrading the inlet meter valve (ex. Exergy Performance CP4.2 Inlet Metering) so that if the CP4 pump grenades it will stop the metal shavings from going further upstream, and (ii) adding a lift pump. There are also advertised conversion kits for swapping out the CP4 pump with a CP3 pump.
I am still weighing options- cash flow being what it is. For the time being I’ll continue to replace my fuel filter long before the DIC tells me too. And when practical, I don’t let my tank go below half, and I add lubricants to the fuel from time to time.
OK, gentlemen, in a nutshell, we already know, and some of us found out the hard way that these CP4 fuel injection pumps do not work so well here in North America because of the lack of lubricant in the diesel fuel. we shouldn’t be having to spend thousands of dollars for a workaround. Nissan and Dodge have already addressed the problem. Nissan stopped selling their diesel engine in North America because of the CP4 fuel injection pump
A president has all ready been set, so GM needs to reimburse all of us for the replacement or replacement cost plus costs occurred for the major inconvenience of this engineering failure! So in saying all this does anybody know the status of the class, action lawsuit, or the law firms involved? specifically in my case ( California.)
Come on GMC, you need to compensate your loyal customers, or forfeit future business. I’m a Floridian. And i sell, through word of mouth, many GMC products.
My 2015 Silverado 2500HD Duramax just failed and my vehicle has been down for six weeks while trying to get repair parts. Bill expected to exceed 15K
How do I get in on the class action lawsuits
Bill
William – I’m waiting to hear something too. Ours went down in January, finally back on the road again in April. 14K later is parts and labor. In Colorado –
Found this on a google search.
The states in which the class-action lawsuit has been certified are California, Florida, Illinois, Iowa, New York, Pennsylvania, and Texas. May 10, 2023
Haven’t been able to find anything for other states (outside of those 7) – not even sure where to turn at this point!
My CP4 failure on my 2011 Chevy 2500HD LML in 2020 @ 99,937 miles cost me approx $9K to replace woth a CP3 conversion and lift pump. General Motors owes me that amount, but the results of a class action suit will be to offer owners $1K off the MSRP on a new Chevy or some crap like that. They did that for the 1985 Chevy K10 truck I owned that would catch fire in a side impact, burning the driver alive. Some deal that was!
THE BIGGEST THING FOR ALL TO DO IS: Report your CP4 fuel injector pump to the National Transportation Safety Board as a safety issue. If the NTSB issues a recall, GM will have to replace/repair/reimburse the owner no matter how many years or miles pass. I reported it to them as I was towing a 36 foot 5th wheel camper (12K+ lbs) downhill when the pump failed, killing my power steering and power brakes. Had that happened when I was in the Colorado mountains, it might have been fatal for myself and my wife. The man took my report and told me about the reimbursementvif deemed a NTSB recall. Everyone needs to report this as a safety issue to get GM to pay for their dangerous coverup!
I’ll be glad to to report my incident. I too was fortunate I was not in the Rockies when my truck stopped running leaving me without power brakes and steering. Is there a process ( website for example) to go to to register the issue with the NTSB?
I was traveling on Route 10 in Virginia and had just entered the city of Hopwell when my pump failed.. I was in heavy morning traffic and lost power steering and power brakes. I ended up having to cut in front of anther car in order to get off the road on the right hand side. I was on my way to the Richmond airport to catch a flight for a business meeting in Ohio when th incident occurred. Fortunately no-one was injured in the incident
This comment forum never allows a url link. Type name (@)where ever (dot) com, gov, whatever. This will post and anyone can use it on their browse.
For whatever reason, moderators don’t seem to want to post my comment with the link to the National Highway Transportation Safety Administration “Report a Safety Problem”. I’ve tried posting it 4 times and will not appear. Type the above into your browser search and that page should pop up.
This site has no moderators though it tells use it will be reviewed. Never happens. See my comment above.
National Highway Transportation Safety Board report a problem site…
www “dot” nhtsa “dot” gov/report-a-safety-problem#index
Hope that works!
www@nhtsa@gov/report-a-safety-problem#index
I was able to submit to the NHTSA site. Hopefully with enough submissions on the site something will get done.
I submitted my complaint on the Bosch Fuel Pump today to the NHTSA website. If you have had an issue with this pump, I strongly suggest that you file your complaint as well.
If you are interested, here is my experience.
2016 GMC 3500 Denali. Purchased new from GMC dealership in Yuba City CA. Moved to Goodyear AZ in 2018.
In May of 2023, at about 67,000 miles the check engine light came on. My Goodyear AZ GMC dealership repaired a problem with the DEF system and checked the fuel system as well. The fuel system was okay. Cost me close to $1k. July 15th, left on 6 6-week RV trip using the 2016 GMC 3500 Denali as a tow truck to my 14,000-pound 5th wheel. After about 500 miles, a “replace fuel filer” warning appeared. I had the fuel filter replaced immediately. After about another 600 miles, the Check Engine Light came on. I immediately took to Red Rock GMC in Grand Junction Co on July 27th. The assessment was a bad fuel pump…$16k to repair and no parts for a month. The technician advised me to drive it back to my Goodyear AZ GMC dealer as the truck was still running at that time. Left the next morning July 28th after canceling the rest of the trip. Got 60 miles and the truck stopped running completely… no power steering no power brakes. Fortunately, I was coming up on an exit off the interstate and found some wonderful people who came to my rescue. (that’s another heartwarming story). I had the truck returned to the GMC dealer in Goodyear. I found out later that the fuel pump is a known issue with these trucks. Yates GMC was fair with me and assumed the majority of the responsibility and cost of repair. I did not have it repaired…sold it to the GMC dealer, sold the RV, and now out of RVing completely.
Same exact story for me. Started with the DEF, i have a 2014 2500, cost me 1000 dollars for a kit. Woked for about 600 miles then problem occured again, many miles from home. Went into limp mode and put my life in danger on I 75. I did call the corp number in the manual, with no satisfactory answer. Sure enough, major expensive repair. Estimate of 12,000 dollars
I am not wealthy! Im 73 years old, on social security ,and very upset about this repair cost. What to hell am i suppose to do? Come on GMC. step up to the plate, and take responsibility. Take care of your loyal customers.
Edmund…Make sure you report it as a safety hazard to the NHTSA at the website above!
Well I had the dreaded cp4 failure towing my trailer back from dropping my kids off to university this year. Left stranded 1 hrs from home on the 401(thank God I was closer to home and not farter away. Had to het my truck towed to dealer and had to try to find someone come pick up my trailer off the 401. Absolutely crappy experience and to a tune of just over 15000. I was definitely not impressed and I’ve emailed my dissatisfaction to gm a few times and my dealer gave me back my truck with the abs traction control service traction control and rear sensors not working basically my interior was still lit up light a Christmas tree and they told me they weren’t fixing it for free even though I didn’t have issues before my pump implosion
Just got back my 2011 2500HD after warranty replacement of the Electronic Brake Control Module Assembly, the Brake Pump Modulator Valve, and the Trailer Brake Control Module, all of which had to be programmed by the VIN number. This was the second time they have falled within the past 18 months, so most all was warranted by a 2 year unlimited mileage warranty, so it cost me nothing, but took up way too much time in the shop. This truck, by far, has had more problems than all my other vehicles combined. The smarter that GM tries to make vehicles, the more screwed up they are! This latest issue occurred just before beginning a 600 mile trip and setting me behind on my vacation by more than a week. I am now more appehensive about taking my truck and camper on long trips than ever before.
Had O2 sensor go out, steering box leakage, Def heater, DEF injector , pump, lines. Total non covered expenses total $5k so far. 31lk on the 2012 LML so far. Got a card in the mail about CP4 pump class action suit that I have been automatically included in. Hope the court holds GM’s feet to the fire. If they give GM a pass it would be sad. Not fair to settle for $1k voucher on another GM vehicle to settle for a $16k someone had to pay out of pocket.
Haven’t heard anything from GMC, about my problem LML, still waiting…
How does someone get in on this lawsuit?
There are certain requirements to join the class action suit. One of them is the state in which the vehicle was purchased. I purchased my 2016 GMC 3500 in California and consequently, I qualified even though I now live in AZ. The lawsuit has been certified as a class action for customers in CA, FL, IL, IA, NY, PA, and Texas. The law firms representing the plaintiffs are The Miller Law Firm, P.C., Hagens Berman Sobol Shapiro LLP, and Hilliard Martinez Gonzalez LLP. So, if you purchased your vehicle in one of these 7 states, I suggest you reach out to one or more of these law firms.
2015 2500HD 81000. Miles on the clock, with air dog 4g 165 and I use additive on every fill up, and I lost my CP4 this weekend $16500. In repairs and Chevy knows this should be a recall! Ridiculous
Check around before throwing down that much money to put the same piece of crap back into the truck. I spent about $9K putting in a Fleece CP3 conversion kit and that $ included adding a lift pump from the tank to the CP3. Chevrolet dealership offered to install another CP4/CP4.2 pump into my truck and I told them no way in hell. Check at some independent diesel repair shops avout CP3 conversions that are almost bullet proof.
Almost “bullet proof ?” Is not a solution! I haven’t heard a thing from GMC, and have already spent thousands of dollars…SHAME! Still waiting…. concerned Florida senior citizen. 2012 silverado 2500 LML… 40,000 miles.
“Almost bullet proof” is just a suggestion to get your vehicle running more dependably. If you read above, I had to spend $9.5K for my repair, but I’m not putting my hopes in a class action lawsuit. There was one on my 1975 K10 pickup for exploding gas tanks that produced a class action lawsuit win of $1K off the purchase of a new Silverado. Only the lawyers got rich. The best options, in my opinion, was to file a safety concern report to the NHTSB (see above for the link). If there are enough safety reports filed, the NHTSB will issue a recall, and if your truck hasn’t suffered failure GM will have to replace/repair the truck. If your pump has already failed and you have had ot repaired, the NHTSB informed me that GM will be required to reimburse you for your repair. I feel your pain, I’m a disabled retired Army Veteran and didn’t have the money available to fix the truck and had to borrow the amount, but I’m not counting on anything coming from a class action suit, other than the lawyers making a fortune
Filed a complaint with NHTS, today. Was successful with the phone call, and relayed all pertinent information regarding my 2012 Silverado 2500, LML, And all its issue’s. Im suppose to hear from them, this coming week on a defect investigation. Hoping for a recall or a reimbusement for repair on the DEF, o2senser, injectors, fuel pump ect….only 40,000miles….
That is great. If everyone files then there is a better chance we all may be rightfully recompensed for our troubles. On the other hand, I don’t expect anything to come directly from General Motors or all the greedy lawyers who are going to get rich for class action suing them. Let’s keep spreading the word and getting everyone to file with the NHTSB!
That is great news someone as to be able to hold GM accountable I spent close to 12000.00 replacing my high pressure fuel pump fuel rail and injectors on my 2016 Silverado left me on the highway stranded and at the mercy of a contract tow company
Many, many folks (to include me) are in the same bucket, but fortunately there is an equitable outcome if we all spread the word from every source we can. I’m positive that there are many, many more than us in this forum that are either unaware of filing with NHTSB or are pinning their hopes with a class-action suit. General Motors have statisticians that compute odds on whether it is cheaper to be sued or voluntarily issue recalls and, on this one, they’re betting it os cheaper to sit and wait for lawsuits due to death and destruction. Just look at the Corvair, Pinto, Vega, and other poorly designed and dangerous vehicles and needless deaths. The more that hear and file, the better our chances are for obtaining financial justice.
Im in Arkansas and I guess we don’t matter in the law suite , they sure sold this thing here and cost me an extra 10700.00 dollars that I didn’t have to spend.
How can Georgia be added to those 7 states?
I just arrived home from a month long vacation and read the notification. I’ve gone this route with my 1985 Chevy K-10. The class action netted me nothing except an offer of $1K off the purchase of a new Chevy. The lawyers no doubt got rich. IF YOU DON’T TELL THEM YOU DON’T WANT TO BE IN THE SUIT, YOU GET WHATEVER THE DAMNED GREEDY LAWYERS DECIDE FOR YOU, (IF THEY WIN) which will be basically squat. If they don’t win, you get nothing and can never sue GM in the future. I am opting out of the class action and waiting for a NTHSB recall so I can get my full repair charge reimbursed. Incidentally, it sucks I have to tell lawyers that I don’t want to be part of something I didn’t ask them to do on my behalf in the first place. These lawyers work for themselves, you’re just a pawn in their money making machine. If you haven’t caught on…I don’t trust lawyers any further I can throw them!
I just started hauling RV across the country all over and I was leaving about 4 weeks ago this happened to me I was leaving Byron Georgia to head to Indiana to pick up another RV and deliver it on Interstate 24 and my truck broke down right inside the Tennessee line and Murphysboro I was 4 hours from home when my truck would not restart and hadto have my vehicle towed all the way back to Johnson City mechanic after a couple weeks looked at it and said to cp4 failed so that put me out of work until I could get it fixed I just returned to the Working World from disability had not made enough to pay for the repair now I have to get a loan and I’ve read all about the diesel fuel in Europe and United States and the fact that that cp4 was built in Europe and designed for European diesel
Raymond, welcome to our unfortunate club. Whatever you do, do not let them put another CP4 or CP4.2 in your truck. Fleece and a number of other brands make a CP3 conversion kit to retrofit your vehicle with a tried and true design that will destroy the entire fuel system, IF IT EVER WOULD FAIL, like the CP4 will. I had a CP3 installed with new injectors, rails, and a FAAS lift pump in the tank and it runs better than before with better fuel mileage. Sorry for your troubles, but be sure to fule a complaint with the NTHSA at the website in the previous comments. That is the only way we’ll ever see financial justice
Our 2015 fuel pump has now gone out for the second time. First time it was under warranty 40K miles later it did it again. game wants to do a lemon law buy back but is only giving us 27k the truck is in excellent shape otherwise. I’m so disappointed in the way they are handling this whole damm thing.
I have a 2013 Chevy HD 2500 Duramax with 142,000 miles. While on a camping trip, the guy camped next to me casually asked if I’d had any issues with my fuel pump? I had not had any issues yet. He went on to tell me his story of his 2012 HD and the repair costs of over $14,000.
I immediately checked with a reputable diesel repair shop in my area. Their remedy is an adapter and a brand new older style pump. My cost was $5600, complete to replace the old pump with an older style. As you can tell, I am not completely schooled on the models and years of the pumps under the class action suit.
I no more got my truck home after the repair when I received in the mail a notice of recall and possible class action eligibility. I am going to pursue the options available. This was all in the last 2 months.
I am located in the Central Valley, California.
Have the same issue right now with my truck. Chevrolet Silverado 3500 Duramax pump just fell apart due to this issue. Sitting right now at the mechanic waiting to have 7k handy to replace the entire fuel system since the metal shavings destroyed the entire thing. Anyone have any updates on this lawsuit or if I need to take any other action?
I was just rudely introduced to what has been now described as a faulty CP4 fuel pump on my 2015 Chevy Silverado 3500HD Duramax! Repairs are going to run around $16,000.00. I was left stranded in the middle of Nevada with hefty tow bills and I’m not at all happy that something should have been done to avoid this!
Sorry to hear, but I’d make sure they replace the CP4 with a CP3 conversion and not with another CP4 or CP4.2 as the dealership wanted to do. The CO3 conversion was cheaper and the CP3 is bulletproof compared to the CP4.
Good advice, this is exactly what my mechanic has suggested.
Thank you
Bruce so sorry to hear of your CP4 failure. Here is the Diesel Shop I dealt with to retrofit my 2013 HD2500 fall of 2023.
Brown’s Diesel Repair in Central Valley California
+1 (559) 867-1111 In Riverdale Ca.
I trust them. If the shop you’re dealing with is not familiar with the CP3 retrofits I would find someone who does. Even if it costs you to tow your rig some where else.
BTW…since coverting to the CP3, my city mileage has gone from 10 to 13 mog and higway from 16 to near 23 mpg. Eventually, you might make the money you spend on repair in fuel savings. Also, I rejected the Class Action suit so that if/when the NTHSA recalls the vehicles as a “safety recall”, I’m going to file against GM for every dime I had to pay to repair, approx $8.5K. File a safety complaint with the NTHSA, even if it just quit on a major highway. I was pulling a 12K pound camper downhill when mine quit. No power brakes, no power steering, and no camper brakes when the truck quit. Fortunately there were very few around me and ultimately stopped going up the hill after I started up the upside of the hill. If the NTHSA (National Transportation Highway Safety Administration) issues a recall, consumers are entitled to mandatory full refunds of repairs.
2015 GMC Denali 3500. Our CP4 pump failed at 112,000. Then 12,000 and 1 1/2 years later we had a catastrophic lower engine failure. We have been told by several diesel mechanics that CP4 failures end up with lower engine failures later on. Hard to get all the contaminants out when they fix the upper components. Work for CP4 pump still under warranty. GM IS STANDING BY NOTHING!!!!!! ZERO! GM strung us along for over 2 months talking about a new engine…..now nothing!!! We have been a GMC family for over 20 years! Never again! Says a lot for brand loyalty.
Luckily, after the CP3 coversion with all new rails and injectors, 25K miles later mine is stronger than ever and all oil changes are clean with no metal shavings at all. I still use full synthetic oil and change regularly. I also change my FASS fuel filter and water separator for my tank lift pump every oil change (approx 7K miles) and, as other say, I use Hot Shotts with every other tank.
I have a 2016 chevy with the cp4 I use Howies fuel treatment, don’t have the money to change out the pump yet I have 144,673 miles on it.
There’s a chance you’ll never have this happen. It’s a coin toss. The thong that increases the possibility of it happening is if you get water in your fuel. Getting something like a FASS fuel lift pump also reduces the possibility. The fuel filter and water seperator on the FASS system is larger and much easier to get to than the stock filters and way easier to change if you get the “water in fuel” warning.
2 years ago in July 2022, the fuel pump in my 2016 GMC 250 diesel went out. Cost me over $10,000 to repair. Spent a week in a hotel while they repaired it. Lost a week on our vacation. All because of GMC’s poor judgement on using the C4 in my truck. Shame on GMC.
2 years ago in July 2022, the fuel pump in my 2016 GMC 250 diesel went out. Cost me over $10,000 to repair. Spent a week in a hotel while they repaired it. Lost a week on our vacation. All because of GMC’s poor judgement on using the C4 in my truck. Shame on GMC.
Be sure to file a safety complaint with the National Transportation Highway Safety Administration. After X number of complaints are filed, the NTHSA will issue a recall and any and all money spent by the consumer will be required to be refunded by General Motors, but only if you exempt yourself from any class action suits. You have to submit a letter to some law firm to exempt yourself from the class action suit BTW. Stupid, but true.
We have 3 of these that we use in logwoods. We are in North Carolina and so far we have not been able to get any help or response from GM regarding the tens of thousands of dollars we have spent on tow trucks, mechanics and ultimately replacing the fuel pumps in these trucks. We have always purchased GM trucks and cars for our businesses but GM has really cost us with this “known” fuel pump issue. You would think GM would want to make this right especially during times where family owned businesses are already struggling to keep things going. Our continued dedication and commitment to GM obviously holds no value to GM considering they will just let their committed and continued customers take the hit for them to knowingly install a very expensive and absolutely necessary component that would knowingly result in mechanical failure and costly repairs. We know of two other individuals that owned one of these trucks and could not afford to pay for the repairs. They couldn’t even trade the truck in bc the truck was not operable. They ended up selling their very expensive diesel truck for parts just to payoff their auto loan. One of the guys has a young family he is trying to support and provide for so this truly caused him and his family a financial loss they still haven’t been able to bounce back from. At what point will GM choose to make this right for its customers ? Are they waiting till they are forced by a judge to make it right?
Yes, GM is not going to make this right without a court order. I keep saying that anyone having this issue report it to the National Transportation Highway Safety Bureau as a “safety issue” because they usually fail in traffic or while moving with a loss of power steering and power brakes, this the “safety issue”. If the NTHSB determines, based on how many failures and safety is involved, they will issue a mandatory recall. If you spent money fixing the vehicle, GM’s will have to reimburse the consumer for all expenses. As importantly, I exempted myself from the class action lawsuit where the lawyers get rich and throw the consumers pigeon feed.
Thanks Al, I went to the website to add my complaints, not many people are complaining there, and they need to. Our truck died in traffic also.
A dealership should always be aware of issues and problems with the vehicles they are selling its just good customer service. They should be liable as well, don’t just send the problem down the line to the next unsuspecting customer. This problem came about in 2019
I just went on the NTHSA website and there were only 2 complaints about the Bosch CP4 Pump. It showed that BMW did recall. I think everyone who has had a failure needs to complain on the vehicle side and the equipment side in order to the NTHSA to do something. I paid over $4,000 for the failure as chevrolet paid some of it at the dealership but they put the same defective pump in the car. It will explode again anytime. We have a ticking time bomb in our diesel trucks.
i just broke down coming out of south Texas in baton rouge looking at 10000 dollars or more to fix the mess the cp4 has caused the dealer wants to go back to another cp4 have they improved them at all? 2013 silverado 6.6 duramax
They cannot improve them as the reason of the failure is the diesel gas in the US is different than that in Europe. If you are paying out of pocket I would tell him to go back to a CP3.
I put a Fleece CP3 fuel injection pump conversion kit, new injectors, new rails, and a lift pump in my 2011 6.6 LML. I have had no problems since (about 30K miles now), runs better, and I get better fuel mileage now. Cost me about $9K.
Where do you participate in this lawsuit
Unfortunately for me I live in Pa and have always registered my 2013 Silverado 2500Hd in Pa but purchased the truck from a Chevy dealer in De. Over $16000 out of pocket between repairs, towing, rental vehicle for 3 1/2 weeks, and refilling my tank which was full when the pump failed.